Stapler



FIG. 1 is a front view of the stapler of the present invention;

FIG. 2 is a rear view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a perspective view thereof.

The broken lines shown in the drawings form no part of the claimed design. 

The ornamental design for a stapler, as shown and described. 